Prevent installation when azure<1.0 is present.
Prevent installation when azure<1.0 is present.

SUSE/azure-storage-python,emgerner-msft/azure-storage-python,rajrohith/blobstore,Azure/azure-storage-python,phonnz/azure-storage-python,jehine-MSFT/azure-storage-python,Azure/azure-storage-python,rajrohith/blobstore